Why would you?

@BDair Because I (naively?) think it'll either prevent Illness or lessen the severity of it if infected. I've had three shots so far, with no problem, so I think I'll be okay getting additional booster shots in the future. Hope so anyway.

To each his own. I have had no injections and have been fine.
I would question the need to risk side effects from a biologic that had only
been tested on eight mice and for which there is no data on long term health effects.
For 99.9% of the popuation, there has been no severe illness from being exposed to a corona virus,
and there are proven protocols for prevention and treatment.

A risk-benefit assessment of boosters in this age group reveals that 22,000 - 30,000 previously uninfected adults between the ages of 18 and 29 must be boosted with an mRNA vaccine to prevent just one Covid-19 hospitalization.

Using CDC and sponsor-reported vaccine injury and adverse events data, the scientists found that booster mandates cause what they call a “net expected harm”: per Covid-19 hospitalization prevented in previously uninfected young adults, 18 to 98 serious adverse events will occur, including 1.7 to 3.0 booster-associated myocarditis cases in young men, and 1,373 to 3,234 cases of vaccine injuries and health problems so serious that they will interfere with daily life.

For these reasons, and others, the authors argue that colleges and universities are acting unethically when they mandate vaccine boosters.

The mandates are unethical for five specific reasons:

1. No formal risk-benefit assessment exists for this age group.

2. Vaccine mandates may result in a net expected harm to individual young people.

3. Expected harms are not outweighed by public health benefits given the modest and transient effectiveness of vaccines against transmission.

4. Mandates in the United States violate the reciprocity principle because rare serious vaccine-related harms will not be reliably compensated due to gaps in current vaccine injury schemes.

5. Mandates cause wider social harms, including widespread discrimination and exclusion, ostracism, severe emotional distress, fear of being deported, and more.